The Naval Base Coronado near San Diego has gone unnoticed since it's groundbreaking in 1967. Then Google Earth had to come in and ruin everything. The satellite mapping site revealed to the public that, from the air, the structure was shaped like a swastika (oops!). Turns out that the Navy knew about this all along, but since the airspace over the Navy yard is restricted they thought no one would ever notice. Well, the Anti-Defamation League did. According to the New York Times:
Now the Navy is speding $600,000 to tweak the roof via landscaping and structural adjustments. May I suggest a green roof?